feat: scaffold electron orchestrator foundation

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/shared/contracts/ipc.ts

@@ -0,0 +1,38 @@
+import type { PatternDefinition } from '@shared/domain/pattern';
+import type { ProjectRecord } from '@shared/domain/project';
+import type { SessionEventRecord } from '@shared/domain/event';
+import type { WorkspaceState } from '@shared/domain/workspace';
+
+export interface CreateSessionInput {
+  projectId: string;
+  patternId: string;
+}
+
+export interface SavePatternInput {
+  pattern: PatternDefinition;
+}
+
+export interface SendSessionMessageInput {
+  sessionId: string;
+  content: string;
+}
+
+export interface ElectronApi {
+  loadWorkspace(): Promise<WorkspaceState>;
+  addProject(): Promise<WorkspaceState>;
+  removeProject(projectId: string): Promise<WorkspaceState>;
+  savePattern(input: SavePatternInput): Promise<WorkspaceState>;
+  deletePattern(patternId: string): Promise<WorkspaceState>;
+  createSession(input: CreateSessionInput): Promise<WorkspaceState>;
+  sendSessionMessage(input: SendSessionMessageInput): Promise<void>;
+  selectProject(projectId?: string): Promise<WorkspaceState>;
+  selectPattern(patternId?: string): Promise<WorkspaceState>;
+  selectSession(sessionId?: string): Promise<WorkspaceState>;
+  onWorkspaceUpdated(listener: (workspace: WorkspaceState) => void): () => void;
+  onSessionEvent(listener: (event: SessionEventRecord) => void): () => void;
+}
+
+export interface RendererSelectionState {
+  selectedProject?: ProjectRecord;
+  selectedPattern?: PatternDefinition;
+}